Undafe car Renault Triber

I have bought a Renault Triber Prestige AMT in April 2021. This is is a very unsafe car. When turning into intersections, you have to wait until there are no cars coming, because it loses speed or pulling away very slowly. Uphill it goes nearly to standstill. The dealer told me I have to lift my foot for +_ 2seconds to gain power. What if other cars are behind you? I was x2 times nearly in accidents because of the car loosing power. What should I do? I only have automatic transmission license.